> For the complete documentation index, see [llms.txt](https://docs.chatvideopro.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.chatvideopro.com/features/studio/stem-separation.md).

# Stem Separation

<figure><img src="/files/9A0gwsnFRKvEs4YZNZZ7" alt=""><figcaption></figcaption></figure>

{% hint style="info" %}
**Audio Expansion.** Stem Separation is part of Chat Video Pro’s **Audio Expansion**. It is included with the **Creator Bundle** and **Creator Pass**, and available as a DLC add-on for **Base**. Generations bill to your own fal.ai account at wholesale rates — same as the rest of Studio.
{% endhint %}

Stem Separation takes a finished audio file and splits it into isolated parts — vocals, drums, bass, and more — so you can remix, mute, or rebuild a mix without leaving Premiere.

**When to Use Stem Separation**

* **Pull vocals** — acapellas for edits, memes, or remixes
* **Instrumental beds** — remove vocals from a music track you already own rights to use
* **Remix in the timeline** — place Vocals / Drums / Bass / Other on separate tracks
* **Cleanup passes** — isolate a problem stem before repair or replacement

{% hint style="warning" %}
**Source audio only from Upload or Recent.** Stem Separation does not pull a clip directly from the Premiere timeline yet — export or save the audio first, then attach it here.
{% endhint %}

**Getting Started**

**Step 1: Open Stem Separation**

1. Open Chat Video Pro (**Window → Extensions → Chat Video Pro**)
2. Click **Studio** → **Audio** department
3. Click the **Stem Separation** card

You’ll see three steps: **Input** · **Stems** · **Generate**.

***

#### Step: Input — Source audio

Attach the track you want to split:

* **Upload** — audio file from disk
* **Recent** — audio you used or generated recently in Chat Video Pro

After attach, confirm **Source audio**, use **Change** if you picked the wrong file, then **Continue**.

***

#### Step: Stems — Stem options

Choose how many parts to extract, then click **Separate Stems**.

<table><thead><tr><th width="140">Option</th><th>You get</th></tr></thead><tbody><tr><td><strong>6 stems</strong> (default)</td><td>Vocals · Drums · Bass · Other · Guitar · Piano</td></tr><tr><td><strong>4 stems</strong></td><td>Vocals · Drums · Bass · Other</td></tr></tbody></table>

{% hint style="info" %}
Start with **6 stems** when guitar/piano isolation matters. Use **4 stems** for a simpler vocal/instrumental split.
{% endhint %}

Result pills label the engine as **Demucs (6-stem)** or **Demucs (4-stem)**.

***

#### Step: Generate — Results

Each stem appears as its own audio pill:

* Preview any stem
* **Place on timeline** — per stem, at the **playhead** on a free audio track
* **Add to Chat** — sends the full stem set into the conversation / Library
* **Try Again** — re-run with the same or adjusted stem count

**Where stems land in Library**

With the Audio Library update enabled, separated stems show under **Library → Audio → Stems**. They are **not** listed under Music — Music is for non-stem music items only.

**Tips for Best Results**

* Feed a clean stereo mix when you can — heavy limiting and stacked FX reduce isolation quality.
* Separate once, then place only the stems you need (e.g. Vocals + Other for a dialogue bed).
* Name or tag takes in chat so you can find the set later in Library → Stems.
* Rights still matter: separation does not grant rights to commercial music you don’t own or license.

**Troubleshooting**

<table><thead><tr><th width="273.63641357421875">Symptom</th><th>What to try</th></tr></thead><tbody><tr><td>Can’t attach from the timeline</td><td>Expected — export/save audio, then <strong>Upload</strong> or pick <strong>Recent</strong></td></tr><tr><td>Missing guitar/piano</td><td>Switch to <strong>6 stems</strong> and Separate again</td></tr><tr><td>Can’t find stems in Library Music</td><td>Open <strong>Library → Audio → Stems</strong></td></tr><tr><td>Bleed between stems</td><td>Normal for dense mixes — tighten with EQ/automation in Premiere</td></tr><tr><td>Engine errors</td><td>Check fal.ai key + balance in Settings → Usage, then Try Again</td></tr></tbody></table>

**See also**

* Music Composer — generate new music instead of splitting an existing track
* SFX Studio — create new sound effects and Foley
* Voiceover Lab — narration instead of pulled vocals
* Pricing FAQ — Audio Expansion entitlement